INDEX 



637 



Cvstoidea, 580, 597 f. 



Cytogainy, 33 f. 



Cytoplasm, 6 ; of ovum of Sea-urcliiu, 7 ; 



granular, nutritive, of muscle cell, 19 ; 



in cell-division by mitosis, 26 f. ; during 



syngamy, 34 



Dactylometra, 311, 323; D. laciea, 312 



Dactylopores, 257 



Dactylozooids, 264 ; of Hydractinia, 264 ; 

 oi Millepora, 259 ; of Siphonophora, 299 



Dale, on chemiotaxy, 22 



Dallinger, W. H., and Drysdale, C, on 

 Protozoa, 44, 45 ; on organisms of putre- 

 faction, 44, 116 f. ; on life-liistories of 

 Flagellates, 116 f. 



Dallingerm, 111, 112, 119 ; anchoring 

 flasella of, 114 ; D. drysdaU, gametes 

 0^^116 n. 



Dalyell, 317 n., 375 



Dangeard, on brood -division in active 

 Chlamydomonadidae, 115 ; on Flagel- 

 lata, 119 n. 



Dantec, Le, on protoplasmic movements, 

 16 n. ; on peptic digestion in Protozoa, 16 



Darwin, 328 n., 360, 391 



Daricinella, '221 



Dasygorgiidae, 333 ( = Chrysogorgiidae, 

 355) 



Davenport on protoplasmic movements, 

 16 n., 19 n. 



Dawydoff, 423 



Dead men's fingers ( = Alcyonium digita- 

 tum, 349) 



Death, 11 ; by diffluence, granular disin- 

 tegration or solution, 14 f. ; by desolu- 

 tion, 15 ; necessary, of colonial cells of 

 Volvox^ 128 ; in Volvox and in Metazoa, 

 compared, 130 



Deep-sea deposits (Foraminifera), 70 



Degen, on functions of contractile vacuole, 

 15 n. 



Degeneration, senile, among Ciliata, 148 



Deglutition in Podoplirya trold, 159 — see 

 also Ingestion of food 



Deiopea, 419 



Deiopeidae, ^Z9 



Delage, on protoplasm, 3 n. ; on syngamy, 

 34 n. ; on motion of fiagella, 114 n. ; 

 on Sponges, 168, 174, 226 ; and 

 Herouard, on Protozoa, 46 



Delap, M. J., 311 n. 



Deltoid plate of Blastoidea, 599 



Demospongiae, 195, 209 f. 



Dendoryx, 224 



Dendrite, 444 



Dendrobrachia, 409 



Dendrobrachiidae, 409 



Dendroceratina, 209, 220, 221 



Dendrochirota, 568, 569, 572, 577, 578 



Dendrocometes, 159, 160, 161 f. 



Dendrograptidae, 2S1 



Dendiiifjraptus, 2S1 



l>e)uliVjihyUia, 4' ^4 



Dcndv. 188 n., 192, 274, 275 



Jtrj,„sfrr//>,. .,'.'/ 



Ih-pa>tri,hu., 320, 321 



iJepastrmii ct/atliiforme, 321 



Depressor muscles of compasses of Echinus 



esculent us, 527 

 Dercitus hucklandi, 221 

 Dermal, gill — see Papula ; membrane, 170 

 Dermali.a, 201 

 Dermaslcrias, 471 

 Desma (the megasclere which forms tlie 



characteristic skeletal network of the 



Lithistida, an irregular branched spicule), 



215, 224 

 Desviacella, 224 

 Desmacidon, 222 

 Desmo2}hyes, 307 

 Desniophyinae, 307 

 Desmothoraca, 71 

 Desolution of protoplasm, 11 f. 

 Deutomerite, 98 

 Development, of Sponges, 226 ; of 



Scypliozoa, 316 ; of Alcyonaria, 341 ; 



of Zoantharia, 373 ; of Echiuoderniata, 



601 f. 

 Dextrin, 15 



Diadematidae, 531, 532, 53S f.. 558 

 Diadematoid type of ambulacral plate, 



531, 539 

 Dialytinae, 192 

 Diancistra (a spicule resembling a stout 



signia, but tlie inner margin of both 



hook and shaft thins out to a knife edge 



and is notched), 222 

 THaphorodon, 59 ; shell of, 60 

 Diaseris, 4O4 ', asexual reproduction, 388 

 Diatomaceae, skeleton of, 84 ; symbiotic 



with CoUospI)ae7-a, 86 

 Diatomin, 86 ; (?) in coloured Flagellates, 



115 n. 

 Dichoporita, 598, 599 

 DIcoryne, 268, 270 

 Dictyoceratina, 220 

 J)icti/')c/)a, 110 

 Dictyochida ( = Silicoflagellata, 110), 79; 



in Pliaeocystina, 86 f. 

 Dictyorystis, 137 ; test of, 152 

 Dictyonalia, 201 

 Dhiyonema, 231 

 Dictyonina, 202 

 JJirfyosfeliini), 90 

 Dicyclica, 594 

 hicymba, 308 

 Dicystidae, 97 



l)idiniiiin. l-i7 ; tricliocysts of, 14-'> 

 Didymium, 90 ; D. diffvrme, 92 

 IMdymoyraplus, 282 

 Diflluence, 14 f. 

 Difflvijia, 52 ; D. pyriformis, 55 ; test of, 



55 



